fluksio run takes inputs after -- as name=value

So an input named like a flag of run, timeout or sync, can still be set.
Flags before -- keep naming inputs as they did.

backend/tests/test_cli.py

@@ -90,6 +90,31 @@ def test_run_arguments_are_typed_by_the_flow_they_are_for() -> None:
         _params(definition, ["--nonesuch", "1"])
 
 
+def test_inputs_after_a_double_dash_may_share_a_name_with_a_run_flag(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """`run --timeout` is the wait; `-- timeout=5` is the flow's input."""
+    from fluksio import cli
+    from fluksio.sdk import cli as sdk_cli
+
+    seen = []
+    monkeypatch.setattr(
+        sdk_cli, "cmd_run", lambda args, rest: seen.append((args.timeout, rest)) or 0
+    )
+    cli.main(["run", "train", "--timeout", "3", "--lr", "0.1", "--", "timeout=5"])
+    assert seen == [(3.0, ["--lr", "0.1", "--", "timeout=5"])]
+
+    definition = {
+        "inputs": [
+            {"spec": {"name": "lr", "dtype": "float"}},
+            {"spec": {"name": "timeout", "dtype": "int"}},
+        ]
+    }
+    assert sdk_cli._params(definition, seen[0][1]) == {"lr": 0.1, "timeout": 5}
+    with pytest.raises(sdk_cli.SyncError, match="name=value"):
+        sdk_cli._params(definition, ["--", "timeout"])
+
+
 def test_a_sweeps_param_spelling_is_refused_by_name() -> None:
     """`run --param lr=0.002` is a name this flow has not got, and says so."""
     import pytest